System and method for powering a hydraulic pump

Abstract

A hydraulic pump powering system includes a mobile vehicle, a first electric current generator device, and one or more electric pump motors. The mobile vehicle has first and second prime movers. The first electric current generator device is disposed onboard the mobile vehicle and is configured to be mechanically coupled with the first prime mover to convert movement created by the first prime mover into first electric current. The one or more electric pump motors are configured to receive the first electric current to power a hydraulic pump. The second prime mover is configured to generate movement that is converted into a propulsive force that propels the mobile vehicle. The one or more electric pump motors are configured to receive the first electric current in order to power the hydraulic pump to pump a fluid into a pumping location located off-board the mobile vehicle.

Description

FIELD[0001]Embodiments of the inventive subject matter described herein relate to powering hydraulic pumps.BACKGROUND[0002]Hydraulic pumps are used to pump fluids from one location to another. For example, hydraulic pumps may be used in hydraulic fracturing to pump fracturing fluid (“fracking fluid”) into a well and beneath the surface of the earth to extract resources such as natural gas from within the earth. In another example, cement pumps can be used for a variety of other pressure pumping services, such as pumping cement to a location where the cement is used to form a structure, provide an anchor or secure a casing of a bore that goes into a well, and the like. Other types of pumps, such as mud pumps that carry lubricant to flush drill cuttings from a well, also may be used.[0003]Known systems used to power these hydraulic pumps include mechanical transmissions that mechanically couple a prime mover with the hydraulic pumps. For example, some known systems include a diesel en...

AI Technical Summary

Benefits of technology

The patent describes a hydraulic pump powering system for a mobile vehicle. The system includes an electric current generator device that converts movement of the vehicle's prime mover into electric current. The electric current is then directed to electric pump motors to power a hydraulic pump, which in turn pumps fluid into a pumping location off-board the vehicle. The system also includes one or more electric traction motors that are coupled with the vehicle's axles or wheels to propel it. The control unit on the vehicle decides when to supply the electric current to the pump motors or the traction motors, based on the vehicle's speed and power demand. The technical effect of this system is to provide a more efficient and effective way to power a hydraulic pump in a mobile vehicle.

Problems solved by technology

At least one shortcoming of using such a mechanical transmission is that the mechanical components of the transmission may be limited in how much power can be transferred from the prime mover to the hydraulic pump.

Some known mechanical transmissions are limited in the power that can be provided to the hydraulic pumps due to design limitations on the gears, pinions, shafts, torque converters, and the like, that are restricted based upon available space for the mechanical transmissions, gear ratios of the mechanical transmissions, or the like.

As a result, the volume of fluid that can be pumped by the hydraulic pump can be limited.

Given the large sizes of the mechanical transmissions and the limits on power that can be provided by the mechanical transmissions, however, a relatively large number of such mechanical transmissions and the vehicles that carry the transmissions may be needed to supply adequate power to the hydraulic pumps.

As a result, many of these vehicles, transmissions, and pumps may need to be located in relatively close proximity at a pumping location (e.g., wellhead) which can create a large degree of congestion at or near the pumping location.

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